Commit 
3e7fc708eb41 ("ia64 idle: delete pm_idle") in 3.9-rc1 didn't
finish the job, leaving an un-initialized reference to (*idle)().
[ Haven't seen a crash from this - but seems like we are just being
  lucky that "idle" is zero so it does get initialized before we jump to
  randomland  - Len ]
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 
                }
 
                if (!need_resched()) {
-                       void (*idle)(void);
 #ifdef CONFIG_SMP
                        min_xtp();
 #endif
                        if (mark_idle)
                                (*mark_idle)(1);
 
-                       if (!idle)
-                               idle = default_idle;
-                       (*idle)();
+                       default_idle();
                        if (mark_idle)
                                (*mark_idle)(0);
 #ifdef CONFIG_SMP